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Maldonado YA, Nahlen BL, Roberto RR, Ginsberg M, Orellana E, Mizrahi M, McBarron K, Lobel HO, Campbell CC.Maldonado YA, et al. Among authors: nahlen bl.Am J Trop Med Hyg. 1990 Jan;42(1):3-9. doi: 10.4269/ajtmh.1990.42.3.Am J Trop Med Hyg. 1990.PMID: 1967916
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